Prefer opening PDF downloads in the browser.

chrome/browser/download/download_shelf_context_menu.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 10 matching lines @@
 //
 // The DownloadItem corresponding to the context menu is observed for removal or
 // destruction.
 class DownloadShelfContextMenu : public ui::SimpleMenuModel::Delegate,
                                  public content::DownloadItem::Observer {
  public:
   enum ContextMenuCommands {
     SHOW_IN_FOLDER = 1,    // Open a folder view window with the item selected.
     OPEN_WHEN_COMPLETE,    // Open the download when it's finished.
     ALWAYS_OPEN_TYPE,      // Default this file extension to always open.
+    PLATFORM_OPEN,         // Open using platform handler.
     CANCEL,                // Cancel the download.
     TOGGLE_PAUSE,          // Pause or resume a download.
     DISCARD,               // Discard the malicious download.
     KEEP,                  // Keep the malicious download.
     LEARN_MORE_SCANNING,   // Show information about download scanning.
     LEARN_MORE_INTERRUPTED,// Show information about interrupted downloads.
   };
 
   virtual ~DownloadShelfContextMenu();
 
@@ skipping 42 matching lines @@
   // Information source.
   content::DownloadItem* download_item_;
 
   // Used to open tabs.
   content::PageNavigator* navigator_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadShelfContextMenu);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_